diff --git a/functions/test/lib/mailchimp.test.js b/functions/test/lib/mailchimp.test.js
index 16c9b66d..1904d4e5 100644
--- a/functions/test/lib/mailchimp.test.js
+++ b/functions/test/lib/mailchimp.test.js
@@ -5,56 +5,58 @@ jest.mock('@mailchimp/mailchimp_marketing', () => ({
   setConfig: jest.fn(),
   lists: {
     addListMember: jest.fn(),
-  }
+  },
 }))
 
-describe('add User to list', function() {
+describe('add User to list', function () {
   beforeEach(() => {
     mailchimp.lists.addListMember.mockClear()
   })
-  it("Should add users to list correctly", async () => {
+  it('Should add users to list correctly', async () => {
     const emailData = {
-      user_email: "example@gmail.com",
-      firstName: "John",
-      lastName: "Doe",
+      user_email: 'example@gmail.com',
+      firstName: 'John',
+      lastName: 'Doe',
       params: {
-        cohort: "test",
-        course: "test",
+        cohort: 'cohort_list_id',
+        course: 'course_list_id',
       },
     }
     await addUserToList(emailData)
     expect(mailchimp.setConfig).toHaveBeenCalledTimes(1)
-    expect(mailchimp.lists.addListMember).toHaveBeenCalledWith("test", {
-      email_address: "example@gmail.com",
+    expect(mailchimp.lists.addListMember).toHaveBeenCalledWith('cohort_list_id', {
+      email_address: 'example@gmail.com',
+      status: 'subscribed',
+    })
+    expect(mailchimp.lists.addListMember).toHaveBeenCalledWith('course_list_id', {
+      email_address: 'example@gmail.com',
       status: 'subscribed',
     })
-  
     expect(mailchimp.lists.addListMember).toHaveBeenCalledTimes(2)
   })
 })
 
-describe("create user in mailchimp", () => {
+describe('create user in mailchimp', () => {
   beforeEach(() => {
     mailchimp.lists.addListMember.mockClear()
   })
 
   const user = {
-    email: "test@gmail.com",
-    firstName: "John",
-    lastName: "Doe",
+    email: 'test@gmail.com',
+    name: 'John',
+    wallet_address: '0x1234567890abcdef',
   }
 
-  it("Should create user in mailchimp", async () => {
+  it('Should create user in mailchimp', async () => {
     await createUser(user)
 
-    expect(mailchimp.lists.addListMember).toHaveBeenCalledWith("b578d43584", {
-      email_address: "test@gmail.com",
-      status: "subscribed",
+    expect(mailchimp.lists.addListMember).toHaveBeenCalledWith('b578d43584', {
+      email_address: 'test@gmail.com',
+      status: 'subscribed',
       merge_fields: {
-        EMAIL: "test@gmail.com",
-        FIRSTNAME: "John",
-        LASTNAME: "Doe",
+        NAME: 'John',
+        WALLET: '0x1234567890abcdef',
       },
     })
   })
-})
\ No newline at end of file
+})